Black Dragon’s Cauldron is a geothermal feature in the Mud Volcano area of Yellowstone National Park. It formed suddenly in 1948 after a hydrothermal explosion and is known for its turbulent, boiling, dark-colored water caused by sulfur and iron compounds. The acidic pool emits steam and a strong sulfur odor, resembling a dragon’s breath. Heat - Temperature | Environment | Nature | Travel Destinations | Horizontal

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